Hi Onur,
Rbst, yes, but no need for the gate resistors or snubber if the layout is good. See app note snva803 for power stage layout guidance. Also, take a look at the LM5146-Q1 EVM for layout of a 8A/400kHz design.
Note that we have a converter…
Hi Tim, I'm still checking on this with our modeling team. Have you looked at the LM(2)5145 or LM5146-Q1? This is our next gen, higher-performance controller family.
Part Number: LM25145 Other Parts Discussed in Thread: LM5143-Q1 , LM5141-Q1 , LM25141-Q1 , LM5146-Q1 Hi Team,
Just want to confirm that whether 25145 could support 15-32 Vin 12Vout and 400W output power.
Hello,
If I would improve this layout further, I would have R11 close in with the FET Q2, as this loop is a noise generator, as well, proper sensing can be achieved small. loop.
I would perfer layout more like LM5146 EVM
While it does not have…
Hi Chris,
Take a look at the LM5146-Q1 EVM layout as an example of a single-sided layout: www.ti.com/.../lm5146-q1-evm12v
In fact, keeping all power stage components on the top side is preferable as it has benefits in terms of EMI.
Also, using…
Hi Onur,
the output capacitance needs to be derated for applied voltage. 2x 22uF/16V/X5R/1210 will be approximately 20uF at 5VDC (check with Murata's online simsurfing tool). Consider changing to 47uF/10V/X7R for higher effective capacitance.
…
Hi Ben,
Another option here is to disconnect VCCX from VOUT and rely on the internal VCC. This lowers the gate drive amplitude and hence reduces the turn-on speed. The penalty in terms of no-load input current is not that big as these FETs are low…
Hello Ivy,
The diode is there to prevent reverse feedback into the Vin node from the Vin pin for the device. This will happen if the voltage being supplied into Vin goes lower than the Vcc bias rail. Unless your power source requires this specifically…
